#app{
    width: 350px;
    padding: 0px;
    margin: 0px;
    overflow: hidden;
    font-size: 12px;
    line-height: 25px;
    border: 1px #000000 solid;

}

ul,li{
    padding: 0px;
    margin: 0px;
    list-style: none;/*原点消失*/

}
/*父级元素相对定位*/
#app ul{
    position: relative;
}

.tipText,.tipBg{
    position: absolute;
    width: 350px;
    height: 25px;
    top: 214px;
    color: black;
}
.tipText{
    /*从0开始*/
    z-index: 999;
}
.tipBg{
    background: #b5cec9;
    opacity: 0.8; /*背景透明度*/
}

